Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0690f706e5a5be8…

MALICIOUS

PDF

88.5 KB Created: 2021-07-30 05:28:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0a957b3ff4861788d6ad9df6a6da69c6 SHA-1: 13cfe7bfa800390ad90d47faa04233954329ee75 SHA-256: f0690f706e5a5be83839630de330862f89e65cf43e6ee198325f74382436945e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites. These links likely serve as lures for phishing attacks or to distribute further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://drafthe.ru/uplcv?utm_term=libro+de+caligraf%C3%ADa+palmer+pdf+gratis PDF link annotation
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/625b283f1d76404d07a4d41931431342/48994297729.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9d3171dd5---wabutuxofafuwigatuwa.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/58a3e0a80df830ada00a47884d04a7f5/74915150339.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/xutusoka.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/151a90ef5997841da07717557f680475/kokel.pdfIn PDF document text
    • http://eiak.org/upload/editor/files/61979378273.pdfIn PDF document text
    • http://transfertrolley.cn/d/files/zesozelolowijarib.pdfIn PDF document text
    • https://papersacksfactory.ae/images/bulk_images/files/zezulizewanopinigebuxabu.pdfIn PDF document text
    • https://szabobuszberles.hu/files/files/xolaxejujokab.pdfIn PDF document text
    • http://tieclangman.com/Images_upload/files/7767936007.pdfIn PDF document text
    • https://investincarpathians.eu/app/webroot/media/files/34940323040.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/35626989595.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/sepawomisinaginujibumax.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4365188cb8---62977762728.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdaf70e8f35---vatetulusasipatoruvozige.pdfIn PDF document text
    • http://liddellgaryfamily.com/clients/863293/File/turak.pdfIn PDF document text
    • https://path.mn/userfiles/files/kewejilivovojaz.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdd4b6a33b---moxotu.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/7bce26a0dd976f2d013003f7cd91304c/dopitopa.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/nutapesitu.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/b2b751e4d6ee7dd72a25cf95515bf234/milogebazoponafadikexas.pdfIn PDF document text
    • http://studioguidobarbieri.it/userfiles/files/31833736490.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/mowazipoxorib.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10617 11016 bytes
SHA-256: 64a1680a7831688aa8422a12b76ca33b519cb0b8c8054e79b2e6eb62818cc8ac
font_02_sfnt_off00011f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F40 19708 bytes
SHA-256: ef0839e72d74861bccb41e5810840ad924269908dfe6d4d8b084eeb3ae1e61df

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